CVE-2026-72355
Linux kernel netfs race can cause kernel memory corruption and compromise.
Is CVE-2026-72355 being exploited?
Not confirmed. CVE-2026-72355 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.55% probability of exploitation in the next 30 days.
How severe is CVE-2026-72355?
CVE-2026-72355 is rated Critical with a CVSS score of 9.8. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-72355?
Yes. A fix has been recorded for CVE-2026-72355. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-72355 affect?
CVE-2026-72355 affects Linux kernel (netfs subsystem). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-72355?
Update to patched Linux kernel or apply vendor kernel patches immediately
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Race in netfs subrequest traversal can cause use-after-free/memory corruption, enabling local privilege escalation or kernel crash; may be leveraged for kernel RCE.
Immediate action required
- affected>= 288ace2f57c9d06dd2e42bd80d03747d879a4068 and < be47c047250671c9225c0319ca4695be9b391c59
- affected>= 288ace2f57c9d06dd2e42bd80d03747d879a4068 and < 5c6ce05e406520290c1d89da97fb3cd70c09137d
- affected6.10
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.